Louisville draft trail plans target risky crossings, missing links and social trails

The 10-year plans identify trail priorities and a case-by-case policy for closing or formalizing social trails, but leave costs and construction decisions to future budget processes.

Published Boulder County
Draft Trail System Plan map showing Louisville’s trail network, open spaces, roads and regional connections.
Draft Trail System Plan map showing Louisville’s trail network, open spaces, roads and regional connections.

Louisville’s draft 10-year parks and trail plans identify risky road crossings, missing trail links and environmentally damaging social trails, but do not approve projects, set construction schedules or assign project costs.

The plans are scheduled for City Council discussion and direction Aug. 25. Public comment is open through Sept. 13, and staff is targeting adoption of revised plans in October. The drafts cover the city’s 54.5-mile trail and pathway network and are intended to guide future work plans, budgets, the Capital Improvement Program and grant applications.

The draft Trail System Plan identifies safety and connectivity problems involving South Boulder Road, the BNSF railroad corridor, McCaslin Boulevard, West Cherry Street and 96th Street. It proposes regional and neighborhood connections, improved at-grade crossings, and new or upgraded underpasses and overpasses.

Crossings and connections

Named priorities include a Lake-to-Lake Trail underpass at U.S. 36; a connection along State Highway 43 north of Empire Road; links between Centennial Parkway and Davidson Mesa Trail, Via Appia Way and North Open Space, and Dillon Road and Coal Creek Trail; connections serving Louisville Middle School; and a route from Dillon Road south to Health Park Drive along 88th Street.

The plan also identifies a Powerline Trail-to-Coal Creek Trail connection, a Via Appia-to-downtown connector, a link from the Campus Drive extension and Red Tail Ridge to the Coal Creek Regional Trail, and a future State Highway 42/South 96th multi-use path connecting southeast to Dillon Road.

Advisory boards and the Trails Taskforce named the Lake-to-Lake/U.S. 36 underpass and State Highway 43 connection as top regional priorities. Their leading grade-separated crossing priorities included McCaslin Boulevard and West Cherry Street; West South Boulder Road at Coyote Run/Callahan Trail; and South Madison and South Polk avenues. Public open-house voting also elevated the Via Appia Way/Tyler Avenue crossing, a Boulder County regional connection, the Dillon Road-to-Coal Creek Trail link, and crossings near South Boulder and Courtesy roads.

The plan says grade-separated crossings would separate pedestrians and bicyclists from vehicle conflicts and provide continuity across major barriers. It cites wide roads, medians, turn lanes and crash concentrations as reasons for several improvements. Other recommendations include rectangular rapid-flashing beacons, traffic signals, better visibility and turning radii in existing underpasses, and drainage and lighting upgrades.

The documents do not provide a complete roadway-name crosswalk for every numbered map location. They also do not establish final alignments, property rights, engineering designs or environmental approvals.

Social trails could be closed or formalized

The Trail System Plan says the city inventoried about 11 miles of undesignated “social” trails in 2025. The unofficial paths form when visitors leave designated routes.

The proposal would close and revegetate social trails in the Open Space Preserve classification, subject to available resources. It would also remove and revegetate trails that interfere with Parks or Open Space operations. Other social trails could be formalized, retained, temporarily closed, restored or monitored.

The plan says the policy is not intended to eliminate every social trail because some provide useful connections. Others damage native vegetation, fragment habitat, disrupt wildlife movement, duplicate nearby routes or lack functional value. Case-by-case reviews would consider land classification, safety, wildlife habitat, trail saturation, erosion and invasive weeds, along with conditions such as raptor nests, prairie-dog colonies, exposed roots, waterway impacts and hazardous road edges.

New or upgraded formal trails would be evaluated for environmental sensitivity, connectivity, safety and accessibility, community demand, feasibility and cost, and maintenance and operational impacts. The plan favors existing roads or disturbed corridors where possible and calls for consideration of wildfire impacts and long-term maintenance.

What could follow adoption

The draft PROS Long-Range Plan describes both plans as strategic frameworks rather than capital improvement programs. They establish priorities and actions but do not prescribe specific capital investments or project-level costs.

If adopted, the plans call for incremental implementation over more than a decade. One- to five-year actions could include wayfinding, signage, small gap closures, safety fixes and social-trail management. Six- to 10-year work would emphasize broader regional connections and environmental stewardship. Ongoing work would include inspections, drainage and surface maintenance, vegetation management, erosion repair, visibility and wildfire-risk reduction.

Potential funding sources include departmental budgets, the General Fund, voter-approved tax or bond initiatives, grants, partnerships, development contributions and philanthropic support. The plans do not identify awarded grants, secured partnerships, appropriations or a ranked project list. They also call for planning additional recreation capacity, including courts, fields and aquatics facilities, but do not approve those projects.

The City Council report says the planning effort was funded with $300,000 for the long-range plan and $100,000 for the Trail System Plan. About $381,000 had been spent, leaving roughly $19,000 for consultant expenses and contingency; staff projected completion within the approved planning budget. That money paid for planning, not construction.

After adoption, PROS staff are expected to develop project details and costs through the regular budget process. Timing would depend on funding, staffing, partnerships, technical and ecological review, additional public input and City Council action.